Triangle read by rows, A173108 * the diagonalized variant of A173110.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =5a(5) =1a(6) =15a(7) =2a(8) =3a(9) =52a(10) =5a(11) =3a(12) =203a(13) =15a(14) =6a(15) =6a(16) =877a(17) =52a(18) =15a(19) =6a(20) =4140a(21) =203a(22) =45a(23) =12a(24) =20a(25) =21147a(26) =877a(27) =156a(28) =30a(29) =20